lib/RegistryExtensions.cs


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using System;
using System.Collections.Generic;
using System.Linq;

namespace jive
{
  public static class RegistryExtensions
  {
    public static K find_an_implementation_of<T, K>(this Registry<T> registry) where K : T
    {
      try
      {
        return registry
          .all()
          .Single(p => p.is_an_implementation_of<K>())
          .downcast_to<K>();
      }
      catch (Exception exception)
      {
        throw new Exception("Could Not Find an implementation of".format(typeof (K)), exception);
      }
    }

    public static IEnumerable<T> sort_all_using<T>(this Registry<T> registry, IComparer<T> comparer)
    {
      return registry.all().sorted_using(comparer);
    }
  }
}